Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-826 8 Falmouth MI FLMOMIXIDS0  0705 CENTURY TEL CO NORTHERN MICHIGAN DBA CENTURYLINK 348      
231-826 9 Falmouth MI FLMOMIXIDS0  0705 CENTURY TEL CO NORTHERN MICHIGAN DBA CENTURYLINK 348      
231-827 A Fife Lake MI GDRPMIIV1MD  2518 LUCRE, INC. 348      
231-828 A Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 0 Twin Lake MI ANTSMIADPS0  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2007-02-25   
231-828 1 Twin Lake MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2014-10-28   
231-828 2 Twin Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-13   
231-828 3 Twin Lake MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-828 4 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 5 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 6 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 7 Twin Lake MI GDRPMIBL30Z  8935 COMCAST PHONE OF MICHIGAN, LLC - MI 348   2007-06-08   
231-828 8 Twin Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-01-27   
231-828 9 Twin Lake MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2013-03-18   
231-829 A Tustin MI TUSTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-829 0 Tustin MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2012-06-01   
231-829 1 Tustin MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-829 2 Tustin MI GDRPMIBL15Z  516C AT&T CORP. 348   2011-08-23   
231-829 3 Tustin MI TUSTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-829 5 Tustin MI BRSPMI096MD  145J TERRA NOVA TELECOM INC. 348   2021-01-19   
231-829 6 Tustin MI GDRPMIBLY4X  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 348   2004-02-12   
231-829 7 Tustin MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2005-04-01   
231-829 9 Tustin MI TUSTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-830 A Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 0 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 1 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 2 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 3 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 4 Muskegon MI KNWDMIJDAMD  6664 SPRINT SPECTRUM L.P. 348   2005-04-15   
231-830 5 Muskegon MI KNWDMIJDAMD  6664 SPRINT SPECTRUM L.P. 348   2005-07-08   
231-830 6 Muskegon MI KNWDMIJDAMD  6664 SPRINT SPECTRUM L.P. 348   2005-07-28   
231-830 7 Muskegon MI KNWDMIJDAMD  6664 SPRINT SPECTRUM L.P. 348   2005-10-01   
231-830 8 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 9 Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-832 A Reed City MI RDCYMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-833 A Wolverine MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-833 0 Wolverine MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2005-06-02   
231-833 2 Wolverine MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2015-06-15   
231-833 3 Wolverine MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2015-06-15   
231-833 4 Wolverine MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2015-06-15   
231-833 5 Wolverine MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2017-05-08   
231-833 6 Wolverine MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2015-12-31   
231-833 7 Wolverine MI TRCYMIMNWMD  7575 CENTURYLINK COMMUNICATIONS LLC 348   2015-09-19   
231-833 8 Wolverine MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2018-12-28   
231-833 9 Wolverine MI BRSPMI096MD  145J TERRA NOVA TELECOM INC. 348   2021-01-19   
231-834 A Grant MI GRNTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-834 0 Grant MI GRNTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-834 1 Grant MI GRNTMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-834 2 Grant MI   279B CLEAR RATE COMMUNICATIONS - CLEC - MI 348   2011-06-22   
231-834 4 Grant MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2016-03-21   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 >>

Last updated: Sun, 07 Feb 2021 01:52:50 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.